#include<stdio.h>
#include<iostream>
#include<string.h>
using namespace std;
int main()
{
	int bonus = 0, profit;
	cin >> profit;
	if (profit > 1000000)
	{
		bonus += (profit - 1000000)*0.01;
		profit -= 1000000;
	}
	if (profit > 600000)
	{
		bonus += (profit - 600000)*0.015;
		profit -= 600000;
	}
	if (profit > 400000)
	{
		bonus += (profit - 400000)*0.03;
		profit -= 400000;
	}
	if (profit > 200000)
	{
		bonus += (profit - 200000)*0.05;
		profit -= 200000;
	}
	if (profit > 100000)
	{
		bonus += (profit - 100000)*0.75;
		profit -= 100000;
	}
	bonus += profit * 0.1;
	cout << bonus << endl;
	return 0;
}